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Sugar Cane-Specific IgG Antibody, Qualitative (Deprecated)

Published: August 9, 2026Updated: August 17, 2026

This blood test looks for IgG antibodies against sugar cane proteins. A positive result may indicate exposure but does not by itself confirm allergy.

Quick summary

["A positive result suggests prior exposure to sugar cane but does not prove a clinical allergy."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
21543-4
Short code
Deprecated Sugar Cane IgG RAST Ql
Synonyms
Deprecated Sugar Cane IgG RAST Ql
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
10
Ref high
40
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
84484
SNOMED
302774002
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What is this test?

This qualitative blood test checks for IgG antibodies directed against sugar cane proteins. IgG is an immune-system protein that can develop after exposure. This test is marked deprecated, so it may not be available at all laboratories.

Why might I need this test?

It may be considered when a clinician is evaluating a possible sugar cane exposure, occupational contact, or reported sensitivity. Your symptoms, exposure history, and other allergy tests are needed to interpret the result.

How is the test performed?

A blood sample is analyzed for sugar cane-specific IgG antibodies using a laboratory antibody assay. The result is generally reported as positive or negative.

How do I prepare for the test?

No special preparation is usually required unless your clinician gives different instructions. Tell the laboratory about recent immunotherapy, immune disorders, medications, and any known sugar cane exposure.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Sugar cane IgG antibody

Frequently asked questions

Does a positive result mean I am allergic to sugar cane?
Not necessarily. Sugar cane-specific IgG can indicate prior exposure or sensitization without causing symptoms, so it cannot diagnose allergy by itself.
Is this the same as a sugar cane IgE test?
No. IgG and IgE are different types of antibodies. IgE is more closely associated with immediate allergic reactions, while IgG more often reflects exposure.
Why was this test marked deprecated?
The test may have limited availability or may not be considered the best standalone way to evaluate suspected sugar cane allergy. Ask your clinician whether a currently available allergy evaluation is more appropriate.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 17, 2026. · Read our editorial policy